Precision Air-Cooled Dry RF Loads are designed as precision, heavy-duty 50-Ohm terminations for isolators and specialized hybrid combining applications operating up to 1000 MHz. These loads have power density factors (ratio of rated power to heatsink surface area) that are among the lowest in the industry which means lower heatsink surface temperatures for a particular power dissipation. They also have excellent return loss characteristics over their entire operating range, making them ideal for use in test as well as operational applications.